<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>表格全选</title>
    <style>
        table {
            border: 1px solid;
            width: 500px;
            margin-left: 30%;
        }

        td, th {
            text-align: center;
            border: 1px solid;
        }

        div {
            margin-top: 10px;
            margin-left: 30%;
        }
        .over{
            background-color: pink;
        }
        .out{
            background-color: white;
        }
    </style>
    <script>
        window.onload = function () {
            //    全选
            document.getElementById("selectAll").onclick = function () {
                //    获取全部的cb
                var cbs = document.getElementsByName("cb");
                //    遍历
                for (var i = 0; i < cbs.length; i++) {
                    //设置每个单选框的checked为true
                    cbs[i].checked = true;
                }
            }

            //    全不选
            document.getElementById("unSelectAll").onclick = function () {
                //    获取全部的cb
                var cbs = document.getElementsByName("cb");
                //    遍历
                for (var i = 0; i < cbs.length; i++) {
                    //设置每个单选框的checked为false
                    cbs[i].checked = false;
                }
            }

            //    反选
            document.getElementById("selectRev").onclick = function () {
                //    获取全部的cb
                var cbs = document.getElementsByName("cb");
                //    遍历
                for (var i = 0; i < cbs.length; i++) {
                    //设置每个单选框的checked为相反值
                    cbs[i].checked = !cbs[i].checked;
                }
            }
            //    第一行选择框和其他的状态
            document.getElementById("firstCB").onclick = function () {
                //    获取全部的cb
                var cbs = document.getElementsByName("cb");
                //    遍历
                for (var i = 0; i < cbs.length; i++) {
                    //设置每个单选框的checked为当前框的checked值
                    cbs[i].checked = this.checked;
                }
            }
        //    设置鼠标事件，添加颜色
            var trs = document.getElementsByTagName("tr");
        //    遍历
            for (var i = 0; i < trs.length; i++) {
                //绑定鼠标事件
                trs[i].onmouseover=function () {
                    this.className="over";
                }
                trs[i].onmouseout=function () {
                    this.className="out";
                }


            }
        }
    </script>


</head>
<body>

<table>
    <caption>学生信息表</caption>
    <tr>
        <th><input type="checkbox" name="cb" id="firstCB"></th>
        <th>编号</th>
        <th>姓名</th>
        <th>性别</th>
        <th>操作</th>
    </tr>

    <tr>
        <td><input type="checkbox" name="cb"></td>
        <td>1</td>
        <td>令狐冲</td>
        <td>男</td>
        <td><a href="javascript:void(0);">删除</a></td>
    </tr>

    <tr>
        <td><input type="checkbox" name="cb"></td>
        <td>2</td>
        <td>任我行</td>
        <td>男</td>
        <td><a href="javascript:void(0);">删除</a></td>
    </tr>

    <tr>
        <td><input type="checkbox" name="cb"></td>
        <td>3</td>
        <td>岳不群</td>
        <td>?</td>
        <td><a href="javascript:void(0);">删除</a></td>
    </tr>

</table>
<div>
    <input type="button" id="selectAll" value="全选">
    <input type="button" id="unSelectAll" value="全不选">
    <input type="button" id="selectRev" value="反选">
</div>
</body>
</html>